diff --git a/src/face.hpp b/src/face.hpp
index 4cb4c67..be1ca06 100644
--- a/src/face.hpp
+++ b/src/face.hpp
@@ -227,6 +227,8 @@
   void 
   onReceiveElement(const Block& wire);
 
+  void
+  asyncShutdown();
   
   static void
   fireProcessEventsTimeout(const boost::system::error_code& error);